Malfrida or Malfrid is the name of a woman who died in 1000 according to the Primary Chronicle (PVL).
Russian historian Vasily Tatishchev believe that Malfrida was a Bohemian wife of Vladimir I of Kiev. Other historians believe that Malfrida was identical to Malusha.
Malfrida may have bore two sons to Vladimir: Svyatoslav of Smolensk (d. 1015) Mstislav of Chernigov (d. 1036) - probably his mother was Rogneda of Polotsk.
References
Bibliography Primary sources Primary Chronicle ( 1110s).